- #1

- 61

- 3

Fr='gamma'*distance from centroid*Area

but the example is showing density in N/m^3

while I only have the density in kg/m^3

Does this mean I have to multiply it by 9.81 to get the right answer?

Thanks.

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- #1

- 61

- 3

Fr='gamma'*distance from centroid*Area

but the example is showing density in N/m^3

while I only have the density in kg/m^3

Does this mean I have to multiply it by 9.81 to get the right answer?

Thanks.

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- #2

Staff Emeritus

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γ is known as the 'weight density' of a substance. γ = ρ ⋅ g, where ρ is the mass density and g is the acceleration due to gravity.Parsifal1 said:

Fr='gamma'*distance from centroid*Area

but the example is showing density in N/m^3

while I only have the density in kg/m^3

Does this mean I have to multiply it by 9.81 to get the right answer?

Thanks.

- #3

- 61

- 3

So, pgh is expressed in N/m^3 as opposed to Kg/m^3?SteamKing said:γ is known as the 'weight density' of a substance. γ = ρ ⋅ g, where ρ is the mass density and g is the acceleration due to gravity.

- #4

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No. Re-read Post #2 again carefully and then work out the units of ρgh versus just ρg.Parsifal1 said:So, pgh is expressed in N/m^3 as opposed to Kg/m^3?

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